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A MANUAL OF THE PENICILLIA 



bearing tips somewhat narrowed ; conidia strongly elliptical with basal ends 

 somewhat flattened, about 4 to 5m by 2.0 to 2.5/i, smooth- walled, remaining 

 adherent in long chains in fluid mounts. 



Colonies on malt agar growing very restrictedly with vegetative mycelium 



Fig. 168. Penicillium albicans Bainier, NRRL 1212. A, Colonies on steep agar at 

 ten days. B, Penicilli as seen under low power, X 90. C, Detail of same, showing 

 characteristic short conidiophores and compact rebranched penicilli which are some- 

 times 4 to 6 times verticillate below the sterigmata, X 750. 



largely submerged, bearing few conidial structures but these similar to the 

 above. 



Upon steep agar, and to a lesser degree on other substrata, the submerged 

 mycelium is characterized by the production of large, oval, smooth, heavy- 

 walled cells, or chlamydospores, measuring about 8 to lO/x in diameter. 

 These may be borne terminally upon short branches or in short chains up to 



